View source for Dieteria canescens

{{Treatment/ID
|accepted_name=Dieteria canescens
|accepted_authority=(Pursh) Nuttall
|publications={{Treatment/Publication
|title=Trans. Amer. Philos. Soc., n. s.
|place=7: 300. 1840
|year=1840
}}
|common_names=Hoary-aster
|special_status={{Treatment/ID/Special_status
|code=F
|label=Illustrated
}}
|basionyms={{Treatment/ID/Basionym
|name=Aster canescens
|authority=Pursh
|rank=species
|publication_title=Fl. Amer. Sept.
|publication_place=2: 547. 1813
}}
|synonyms={{Treatment/ID/Synonym
|name=Machaeranthera canescens
|authority=(Pursh) A. Gray
|rank=species
}}
|hierarchy=Asteraceae;Asteraceae tribe Astereae;Dieteria;Dieteria canescens
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Asteraceae]]</div><div class="higher-taxon"><small>tribe</small>[[Asteraceae tribe Astereae]]</div><div class="higher-taxon"><small>genus</small>[[Dieteria]]</div><div class="higher-taxon"><small>species</small>[[Dieteria canescens]]</div></div>
|volume=Volume 20
|mention_page=page 396
|treatment_page=page 398
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Annuals,</b> biennials, or short-lived perennials, (subshrubs in <i></i>var.<i> ziegleri</i>). <b>Stems</b>, branches, and peduncles glabrous, puberulent, or canescent, sometimes also stipitate-glandular or gland-dotted. <b>Leaf</b> blades linear-lanceolate to linear or linear-oblanceolate (ovate to obovate in <i></i>var.<i> leucanthemifolia</i>), mid 10–60 × 1.5–6(–8) mm, margins entire to irregularly dentate or serrate, faces glabrous, puberulent, or canescent, sometimes sparsely stipitate-glandular; distal bases not clasping or slightly clasping (clasping in <i></i>var.<i> leucanthemifolia</i>). <b>Involucres</b> campanulate or turbinate. <b>Phyllaries</b> in 3–10 series, appressed, spreading, or reflexed, indurate bases usually glabrous, apices acute to acuminate, 1–3 mm, herbaceous, faces glabrous (indurate bases, sometimes foliaceous parts) or hairy (only foliaceous parts), sometimes stipitate-glandular. <b>Receptacles</b> 2.5–5 mm diam. <b>Ray</b> florets pistillate and fertile, or sterile or 0 (in <i></i>var.<i> shastensis</i>); laminae white, blue, or purple, 6–12 × 1–3 mm. <b>Disc</b> florets: corollas 4–6(–7) mm. <b>Cypselae</b> glabrous or moderately appressed-hairy.</span><!--

-->{{Treatment/Body
|distribution=Alta.;B.C.;Sask.;Ariz.;Calif.;Colo.;Idaho;Kans.;Mont.;N.Dak.;N.Mex.;Nebr.;Nev.;Oreg.;S.Dak.;Tex.;Utah;Wash.;Wyo.;nw Mexico.
|discussion=<p>Varieties 10 (10 in the flora).</p>
|tables=
|references=
}}<!--

--><div class="treatment-key">
==Key==
<div class="treatment-key-group">
  
{| class="wikitable fna-keytable"
|-id=key-0-1
|1
|Phyllaries usually appressed, sometimes spreading, rarely reflexed
|[[#key-0-2| > 2]]
|-id=key-0-1
|1
|Phyllaries spreading to reflexed, rarely appressed
|[[#key-0-5| > 5]]
|-id=key-0-2
|2
|Ray florets sterile or 0
|[[Dieteria canescens var. shastensis|Dieteria canescens var. shastensis]]
|-id=key-0-2
|2
|Ray florets pistillate and fertile
|[[#key-0-3| > 3]]
|-id=key-0-3
|3
|Phyllaries densely appressed-hairy, usually eglandular, sometimes sparsely stipitate-glandular, then obscured by appressed hairs
|[[Dieteria canescens var. ambigua|Dieteria canescens var. ambigua]]
|-id=key-0-3
|3
|Phyllaries glabrous or stipitate-glandular, rarely appressed-hairy or canescent
|[[#key-0-4| > 4]]
|-id=key-0-4
|4
|Stems stipitate-glandular, sometimes also canescent, rarely glabrous
|[[Dieteria canescens var. aristata|Dieteria canescens var. aristata]]
|-id=key-0-4
|4
|Stems glabrous, puberulent, or canescent, sometimes sparsely stipitate-glandular
|[[Dieteria canescens var. glabra|Dieteria canescens var. glabra]]
|-id=key-0-5
|5
|Involucres (9–)10–16 mm
|[[#key-0-6| > 6]]
|-id=key-0-5
|5
|Involucres 6–10(–12) mm
|[[#key-0-7| > 7]]
|-id=key-0-6
|6
|Subshrubs; involucres (10–)12–16 mm; phyllary apices densely stipitate-glandular
|[[Dieteria canescens var. ziegleri|Dieteria canescens var. ziegleri]]
|-id=key-0-6
|6
|Biennials or short-lived perennials; involucres (9–)10–15 mm; phyllary apices densely appressed-hairy, sometimes stipitate-glandular, then obscured by hairs
|[[Dieteria canescens var. nebraskana|Dieteria canescens var. nebraskana]]
|-id=key-0-7
|7
|Stems canescent, sometimes sparsely stipitate-glandular
|[[#key-0-8| > 8]]
|-id=key-0-7
|7
|Stems stipitate-glandular, usually also puberulent or canescent, sometimes glabrous
|[[#key-0-10| > 10]]
|-id=key-0-8
|8
|Stem usually 1, stiffly erect, branches widely divaricate, straight, stiff
|[[Dieteria canescens var. incana|Dieteria canescens var. incana]]
|-id=key-0-8
|8
|Stems 1+, usually ascending, branches loosely spreading to ascending, not widely divaricate, curved, flexible
|[[#key-0-9| > 9]]
|-id=key-0-9
|9
|Phyllaries in 5–10 series; ray florets pistillate and fertile
|[[Dieteria canescens var. canescens|Dieteria canescens var. canescens]]
|-id=key-0-9
|9
|Phyllaries in 3–5(–7) series; ray florets sterile or 0
|[[Dieteria canescens var. shastensis|Dieteria canescens var. shastensis]]
|-id=key-0-10
|10
|Stems canescent, usually gland-dotted; most peduncles 0 (heads sessile) or shorter than involucres
|[[Dieteria canescens var. sessiliflora|Dieteria canescens var. sessiliflora]]
|-id=key-0-10
|10
|Stems stipitate-glandular, also sometimes puberulent or canescent; peduncles equaling or longer than involucres
|[[#key-0-11| > 11]]
|-id=key-0-11
|11
|Mid and distal leaf blades ovate, oblong, or obovate, lengths 1.5–4 times widths
|[[Dieteria canescens var. leucanthemifolia|Dieteria canescens var. leucanthemifolia]]
|-id=key-0-11
|11
|Mid and distal leaf blades linear-lanceolate to linear, lengths 4+ times widths
|[[Dieteria canescens var. aristata|Dieteria canescens var. aristata]]
|}
</div></div><!--

-->{{#Taxon:
name=Dieteria canescens
|authority=(Pursh) Nuttall
|rank=species
|parent rank=genus
|synonyms=Machaeranthera canescens
|basionyms=Aster canescens
|family=Asteraceae
|distribution=Alta.;B.C.;Sask.;Ariz.;Calif.;Colo.;Idaho;Kans.;Mont.;N.Dak.;N.Mex.;Nebr.;Nev.;Oreg.;S.Dak.;Tex.;Utah;Wash.;Wyo.;nw Mexico.
|reference=None
|publication title=Trans. Amer. Philos. Soc., n. s.
|publication year=1840
|special status=Illustrated
|source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-data-curation.git/src/bb6b7e3a7de7d3b7888a1ad48c7fd8f5c722d8d6/coarse_grained_fna_xml/V19-20-21/V20_909.xml
|tribe=Asteraceae tribe Astereae
|genus=Dieteria
|species=Dieteria canescens
}}<!--

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[[Category:Dieteria]]
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